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A268372 as a simple table

na(n)
10
20
30
40
50
60
70
81
90
101
112
121
131
141
151
161
173
182
192
201
212
221
234
242
253
262
274
282
294
302
313
322
333
342
355
362
375
383
394
403
416
422
435
442
455
462
476
482
495
503
516
523
537
543
556
563
577
584
598
603
617
624
637
643
658
662
678
684
697
704
719
723
738
744
758
764
779
782
799
805
818
825
839
843
858
864

[0,0,0,0,0,0,0,1,0,1,2,1,1,1,1,1,3,2,2,1,2,1,4,2,
 3,2,4,2,4,2,3,2,3,2,5,2,5,3,4,3,6,2,5,2,5,2,6,2,5,
 3,6,3,7,3,6,3,7,4,8,3,7,4,7,3,8,2,8,4,7,4,9,3,8,4,
 8,4,9,2,9,5,8,5,9,3,8,4]